PTEROMALIDAE OF N.W. EUROPE 351 



surface of wing effaced by scattered hairs ; surface beyond the speculum rather thickly pilose 

 throughout ; marginal vein 4-5 to 6 times as long as the stigmal vein ; stigma moderate-sized, 

 slightly longer than high ; postmarginal vein fairly distinct, nearly or just as long as the stigmal 

 vein. 



Gaster oval, nearly as long as but slightly narrower than the thorax, sunken dorsally, not much 

 compressed laterally, hence about as broad as high, carinate ventrally ; hypopygium very 

 long, its tip situated at about five sixths the length of the gaster, or more ; tips of ovipositor 

 sheaths just visible in profile but not projecting beyond the level of the apex of the last tergite. 



o*. Differs from the female as follows : 



Malar space half the length of an eye. Antennae (Text-fig. 275) with scape strongly swollen, 

 only about twice as long as broad, as long as an eye, with a deep membrane-lined excavation in 

 the upper part of its front surface, for the reception of the pedicellus ; pedicellus nearly as long 

 as flagellar segments one to four, in profile about 2-5 times as long as broad, but flattened dorso- 

 ventrally so that in dorsal view it appears only about i-6 times as long as broad ; first flagellar 

 segment subquadrate and slightly longer than the second segment, the latter slightly transverse, 

 third segment subquadrate and about as long as the first ; fourth slightly larger than the third ; 

 fifth distinctly longer than the fourth, quadrate or slightly longer than broad ; the fifth segment 

 is provided with sensilla, the other segments lack them (there may be one sensillum on the 

 fourth segment, but I am not quite sure). Thorax not quite so flattened, the dorsal surface 

 being slightly arched and the scutellum weakly convex. Gaster oval, shorter than but almost 

 as broad as the thorax, flattened dorso-ventrally. 



Holotype $. Czechoslovakia : Praha-Bohnice, 4.viii.ig65 (Z. Boucek), in 

 National Museum, Prague. 



Paratypes. Czechoslovakia : Bohemia, Kytin (Brdy), i $, vii.1959 (/. Macek) ; 

 Praha-Bohnice, 1 £, 4.viii.io,65 (Z. Boucek) ; Luka pod mednikem, 1 9, 4.vii.io,54 

 (Z. Boucek), in National Museum, Prague. 



England : Oxfordshire, Otmoor, 1 $, 5.VL1958, on a flower-head of Angelica 

 sylvestris L. (Graham), in Graham collection. 



I have great pleasure in naming this species after my friend, Dr. Boucek. 



The female of bouceki differs from all the other described species of Pirene in having 

 three of the flagellar segments provided with sensilla (in the other species at most two 

 segments have sensilla) and in having the speculum of the fore wing nearly effaced 

 on the lower surface of the wing, whilst on the upper surface it extends 

 barely half way along the marginal vein (in the other species it is at most partly 

 effaced on the lower surface, whilst on the upper surface it extends at least as a narrow 

 bare strip below the marginal vein as far as the stigmal vein). The pecten of the 

 hind tibia is not developed ; it is at least slightly developed in the other species. 



The male of bouceki differs from all the other described Pirene in its rudimentary 

 speculum (as in the female) ; in having at most the first three flagellar segments 

 slightly transverse, the other segments being subquadrate ; the clava distinctly 

 shorter than the funicle ; the excision at the apex of the scape much larger than in 

 any other species, extending more than one third down the scape. The pecten of 

 the tibia is not developed. In all the other species, either the antennal scape is not 

 swollen, or if strongly swollen, then the apical excision extends less than one third 

 down the scape ; the clava is as long as or longer than the funicle : at least three of 



